Sock-liner protector for automatic shoe nailing machines



April. 4, 1950 A. sAvA 2,502,594 SUCK-LINER PROTECTOR FOR AUTOMATIC SHOE NAILING MACHINES Files? July 9,- 1948 INVENTOR.

Patented Apr. 4, 1950 SOCK-LINER PROTECTOR FOR AUTOMATIC SHOE NAILING MACHINES Amabil Sava, Los Angcles, Calif. Application July 9, 1948, Serial No. 37,790

4 Claims.

This invention relates to automatic shoe soling machines, and concerns an accessory for such machines. These machines usually comprise an automatic nailing head and guide for wire nails that are driven down into the heel of the shoe while it is clamped between the said guide head and the upper end of the horn. This horn is supported on the automatic machine below the driving head and nail guide.

In using such a machine to attach a heel to a shoe-sole, it is necessary to drive some nails that operate as clinchers, that is to say, the points of these nails are turned automatically when they are driven, so as to clinch them on the inner side of the insole. To perform this clinching operation on some of the nails, the machine is provided with a horn tip that is socketed on the upper face of the horn. It has a metallic thick discform body, the upper face of which is provided with a plurality of circumferential grooves, and when the nail is driven the tip is forced into one of these grooves, which turns it and clinches it on the inner side of the sole. In effecting a repair job on a shoe, by attaching a new heel or new heel lifts to the shoe, the sock liner of the shoe is of course, in place within the shoe, and it seats against the upper face of the clinching horn tip referred to above. When the short nails are driven, that are not to be clinched, the nail guide and the horn are moved automatically by the machine to clamp the heel in place as the driving head within the casing or nail guide, drives the nail. This clamping of the heel in this way is accomplished with considerable force, the result of which is that the grooves referred to in the clinching horn tip, are embossed in the sock liner. As the sock liner is relatively thin, this action is quite objectionable; it may injure the sock-liner and also may render the heel portion of the sock-liner uncomfortable when the shoe is worn.

One of the objects of this invention is to provide means co-operating with the nail guide and shoe horn to overcome the objectionable embossing operation referred to above.

Stated more specifically, one of the objects of my invention is to provide an accessory capable of being mounted on the seat face of the horn,

and having a construction which will enable the horn to perform its function of clamping the shoe-heel and operating as a back-stop for a driven nail yieldingly, and in such a way that the sock-liner will not be subjected to any embossing effect.

Further objects of the invention will appear hereinafter.

The invention consists in the novel parts and combinations of parts to be described hereinafter, all of which contribute to produce an eificient sock-liner protector for automatic shoe nailing machines.

A preferred embodiment of the invention is described in the following specification, while the broad scope ofthe invention is pointed out in the appended claims.

In the drawing:

Fig. 1 is a side elevation of a diagrammatic nature illustrating a shoe clamped between the driving head guide and the seat face of the horn, the lower portion of the guide for the horn being broken away.

' Fig. 2 is a fragmentary View which is also a side elevation and partial section of the upper end of the horn, and illustrating my accessory in place on the seat face of the horn. This view is upon an enlarged scale.

Fig. 2a is a side elevation in partial section illustrating the horn tip referred to above, and which co-operates with the nail driving head to clinch the long nails that are used to secure the heel to-theshoe sole.

Fig. 3 is a bottom plan of my accessory that is illustrated in Fig. 2. I

Referring more particularly to the parts, I indicates the horn of an automatic soling machine of the type commonly used for effecting repairs in shoes. The body of this horn is in the form of a bend or bight =2, and the lower end of the horn has a shank 3 that extends down through a sleeve 4. This'sleeve is formed at one side with arack indicated by the dotted line 5. In these machines a pinion co-operates with this rack to raise the sleeve to any desired position. Inthis way the upper end of the horn is raised to suit the requirementof any particular operation, or the personal requirement of the operator of the machine. The shank 3 is rotatable in the sleeve 4, and the sleeve 4 slides freely through a collar 6 that seats o the upper end of the guide 1. Below the guide I the machine is provided with a pinion that functions to raise the sleeve to any desired level, and the collar 6 is provided with a pawl (not illustrated) to co-operate with the rack, and this pawl when desired, can be disengaged by pressing down on its handle or operating lever 8.

The upper end 9 of the horn is formed with a long taper, and presents a substantially horizontal seat face II]. This seat face has a socket H that passes down into it from above for a purpose that will appear hereinafter.

In a nailing operation, the driver housing l2 which terminates below in a nail guide [3, is moved down automatically so that a shoe heel l4 that is to be applied to the shoe sole I5, is clamped between the bottom face or nose of the nail guide I3, and the seat face I of the horn. When the clincher nails referred to are being driven, a clincher horn tip I6 is carried on the relatively flat, substantially horizontal seat face ID of the horn. This clincher horn tip is illustrated in Fig. 2a. It has a thick disc-form body of hardened metal, the upper face of which is formed with two concentric grooves l1 and ill. The lower face of this horn tip is provided with a pintle 19 which is socketed in the socket l I. When the nail driving head in the housing I2 is driving the relatively long clincher nails referred to, this clincher horn tip [6 is in place. After a sufiicient number of these clincher nails have been driven to secure the body of the heel 14 to the sole I5, then other short nails are driven, which are not clinched, but which assist in securing the lifts of the heel in place between the shoe sole and the bottom lift of the heel.

After the clincher nails have been driven, I remove the horn tip l6 and replace it by my accessory horn tip 21. This tip has a pintle 22 similar to the pintle l9, but its body is of cupform so as to receive a pad or cushion 23 which projects considerably above the upper edge 24 of the cup of this tip 2|. This is necessary to enable it to hold the sock-liner out of contact with the upper edge of the cup-form body 2 l.

I prefer to form the tip 2! with an inner chamber 25 which is of greater width below than it is above; that is to say, it is wider at the disc 26 of the cup which forms the bottom of the cup, and which is integral with the side wall of the cup. I prefer to give this chamber 25 a slightly conical form so that its side walls converge inwardly in an upward direction.

The pad 23 should be of somewhat larger diameter as originally formed, than the diameter of the chamber, so that it is necessary to compress it considerably when forcing it down into the cup from above. In order to facilitate this operation of inserting a pad in the cup, I prefer to form its disc bottom 26 with an air vent 21 through which the air below the pad will be expelled when the pad is forced downwardly.

The upper face 28 of this pad 23 is of course a flat or plane face, and this is the face against which the sock-liner 29 seats when short nails are being driven down through the nail guide l3. It of course can not emboss the sock-liner as the circular ridges 30 between the grooves l1 and I8 do. However, the pad oifers sufiicient resistance to enable this horn tip to co-operate effectively with the driver housing 12 to clamp the heel securely, and to operate as an effective back-stop for the short nails when they are driven into the heel.

I am aware that in some machines of this character, small metallic shoes with plain upper faces have been provided to be slipped over the end of the horn, and which are attached to a coil spring such as the coil spring 31 illustrated in Fig. 1, the lower end of which is anchored to a collar 32 secured on the lower portion of the horn. Such an accessory as that, however, is unsatisfactory because the spring 3| is in the way of the cobbler, and furthermore, the mounting of this accessory shoe in position on the horn is insecure.

I claim as my invention:

1. In an automatic shoe-nailing machine, the combination of a nail-driving head and guide, a horn below the level of the nail-driving head and guide, co-operating with the same to provide a seat for the sock-liner of the shoe, and to forcibly clamp the shoe when the automatic nail-driving mechanism drives a nail into the sole or shoe heel; said horn having its upper end surface portion formed with a relatively flat area, a socket formed in said flat area, a horn tip having a depending pintle portion adapted to seat in said socket, said socket including a cup-form body adapted to seat on said flat area when said depending pintle is in said socket, said cup being defined by an upwardly facing rim, a pad of cushion material arranged in said cup and projecting upwardly above said rim so as to hold the sock-liner out of contact with the cup, and operating to prevent the horn from embossing the sock-liner within the shoe.

2. An automatic shoe-nailing machine according to claim 1, in which the interior of the horn tip has its greatest dimension at its bottom.

3. An automatic shoe-nailing machine according to claim 1, in which the said cup-form body has a chamber of substantially conical form to receive the said pad, and having its largest diameter below.

4. An automatic shoe-nailing machine according to claim 1, in which the said cup-form body has a chamber of substantiall conical form to receive the said pad, having its largest diameter below, and having a vent in its bottom wall through which air within the body can be expelled when the pad is being forced down into the interior of the body.

AMABIL SAVA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 609,209 Painter Aug. 16, 1898 920,048 Godman Apr. 27, 1908 1,382,759 Casgrain June 28, 1921 FOREIGN PATENTS Number Country Date 269,321 Germany Jan. 20, 1914 

